Dataset: Sediment organic carbon for subtidal seagrass (Zostera capensis) in the Olifants Estuary, South Africa

This dataset contains sediment organic carbon (%SOC) for subtidal seagrasses (Zostera capensis) in the Olifants River Estuary on the west coast of South Africa. A total number of 36 sediment cores were collected during May 2023, along triplicate transects (~50m apart) across three sampling sites. PVC pipes were used to collect cores up to a mean depth of 27 cm. Included in this dataset is the %SOC for 12 cores collected in May 2024 from one of the sampling sites from the previous sampling effort. All samples were acidifies with 1N hydrochloric acid and rinsed to remove inorganic carbon. Organic carbon content was quantified using an Elemental Vario EL Cub CHNS Analyzer.

本数据集包含南非西海岸奥利凡茨河河口潮下带海草——卡普斯大叶藻（Zostera capensis）的沉积物有机碳占比（%SOC）。2023年5月，研究团队在三个采样点位沿间隔约50米的三重重复样带开展采样，共计采集36根沉积物柱芯；采样过程采用聚氯乙烯（PVC）管获取柱芯，平均采样深度达27厘米。此外，本数据集还纳入了2024年5月于其中一处此前采样点位采集的12根柱芯的沉积物有机碳占比数据。所有样品均使用1N盐酸进行酸化处理并冲洗以去除无机碳，沉积物有机碳含量通过Elemental Vario EL Cub CHNS元素分析仪完成定量检测。